Sunday, June 24, 2012

Bailing, Bone Beads, and Bioturbation

Week One got underway with a bit of a snag.  Torrential rains prior to our first day of excavation soaked the west end of our bulldozer transect and made it impossible to begin work there as planned.  Our new students did get a chance to learn the fine art of bailing water with a plastic scoop and bucket.  This tutorial repeated itself on Tuesday after another rainstorm.   So, I decided to move south


and begin the excavation of 2x2 meter units.  My original plan was not to begin this stage of our test excavations until later in the summer, but we needed dry places to dig.  My goal with this testing is to recover a statistically significant sample of the remaining portion of the site within the large area enclosed by the parallel ditch features found in 2009.   The results so far are unspectacular but not uninteresting.

In unit 486N 505E we found three very dark feature stains which looked like pit features but seemed rather fresh to me.   Once we began to cross-section the first pit, we soon found small pieces of plastic and paper.  Uh oh!   We have learned over the last three years that such debris most likely mark the former excavation of our Kent State University colleagues who preceded us in investigating the Heckelman site back in 1968.  This proved to be true as we cut into the other two features.  Yes, they had once been prehistoric pits but were probably excavated before the Beatles broke up.  And we get to dig the backfill.   This outcome was a bit disappointing for our new students, but it proved to be a good lesson in how to read a pit profile.  This is because the cross-section of one feature revealed that it still retained a bit of its original fill, as shown by the image below (the upper dark soil stratum is the recent backfill).   Even better, this bit of dirt contained a small bird bone bead.  So, all was not lost.


 After a few days of hot sunshine, we were able to begin work on our transect.   Our crew shovel-scraped, troweled, and brushed like old pros and soon we found more stockade posts, which aligned with those found last season.  We noticed that these units, which are "beyond the pale" so to speak, don't contain many features.  Just a few small pits and additional, scattered post molds.

One unit provided another example of recent digging but not by archaeologists.  As we cleaned the floor of unit 514N 503E, we found the remains of a veritable rodent rendezvous marked by many sinuous burrows and vertical tunnels, as shown below.   This was an illustration of "bioturbation" at its finest.  A suitable discovery in a week filled with disturbances, both human-made and natural.




Tuesday, June 19, 2012

Our Fourth Season is Underway

As usual, our fourth season of excavation at the Heckelman site began with the ceremonial "bulldozing of the transect."  Actually, this is a necessary means of removing the uninformative plow zone that covers the very informative features and post molds which have told us so much about this site over the last three years.  This year, we undertook the mechanical stripping of plow zone prior to the first day of the field school (June 14) to give us more time to prepare the site. 


One new addition this season was the setting of colored stakes to demarcate the various important structures that we have discovered.  We now have blue stakes outlining the oval enclosure, yellow stakes around Structure 2, the early Late Woodland house, and the pit house we found in 2009.  We even set out pretty pink stakes along two of the stockade lines bordering the Late Prehistoric period village settlement.  
 
This effort quickly proved its value today when we hosted a group of 25 teachers participating in a workshop sponsored by the Seneca County Soil and Water District.   This morning I gave an hour-long PowerPoint presentation on the Heckleman site to these same teachers in Attica, Ohio.   During the site tour, I think the staked outlines really helped illustrate the significance of what we have found so far.  At least they "prettyed-up" the site somewhat.



Sunday, March 25, 2012

Firelands Ground Sloth

One of our other recent projects in Archaeology at the CMNH is the study of the Firelands Ground Sloth.  This project involved the documentation of 41 stone tool cut marks found on the femur (thigh bone) of an extinct Ice Age animal called the Jefferson's Ground Sloth (Megalonyx jeffersonii).  Ten bones of this creature were found several years ago in the attic of the Firelands Historical Society Museum in Norwalk, Ohio by Matt Burr.  Matt showed me the bones five years ago, and since then, we have been examining the traces of stone cutting tools used to butcher the animal.  The bones have been dated to more than 13,000 years old and represent the first evidence for the use of this particular Ice Age animal by ancient humans in Ohio.   The results of our work were recently published in the journal World Archaeology (vol. 44, no. 1, pp. 75–101).   Images of the femur and other illustrations can be seen on the CMNH website.  A nicely done story on the project was produced by WKSU radio.